Engineering Industry Training Board (Great Britain). (1970). The technician in engineering: Report of a survey of the employment, recruitment and qualifications of technicians in the engineering industry, 1969. Engineering Industry Training Board.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Engineering Industry Training Board (Great Britain). The Technician in Engineering: Report of a Survey of the Employment, Recruitment and Qualifications of Technicians in the Engineering Industry, 1969. London (St Martin's House, Tottenham Court Rd, W1P 9LN): Engineering Industry Training Board, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Engineering Industry Training Board (Great Britain). The Technician in Engineering: Report of a Survey of the Employment, Recruitment and Qualifications of Technicians in the Engineering Industry, 1969. Engineering Industry Training Board, 1970.